Parameter estimates and p values for longitudinal analyses of nerve conduction results by group modelled as a function of group, time, group-time interaction, covariates,* and significant three-way interactions using a stepwise selection procedure (n = 113)
| Group (p value) | Time (p value) | Group*time (p value) | |
|---|---|---|---|
| *Potential covariates included age, height, weight, sex, body mass index, temperature over nerve being tested, education level, anxiety, smoking pack-years, and estimated general ability. | |||
| Median sensory | |||
| Amplitude (μv) | −2.41 (0.13) | 2.26 (<0.01) | −0.09 (0.91) |
| Terminal CV (m/s) | −0.64 (0.51) | −2.34 (<0.01) | −0.09 (0.91) |
| Distal latency (ms) | 0.03 (0.65) | 0.19 (<0.01) | 0.01 (0.88) |
| Ulnar sensory | |||
| Amplitude (μv) | −1.20 (0.30) | 3.72 (<0.01) | −0.68 (0.59) |
| Terminal CV (m/s) | −0.05 (0.91) | −2.98 (<0.01) | 0.28 (0.73) |
| Distal latency (ms) | 0.01 (0.78) | 0.15 (<0.01) | 0.01 (0.88) |
| Sural sensory | |||
| Amplitude (μv) | −0.65 (0.75) | 0.24 (0.04) | 1.97 (0.10) |
| Terminal CV (m/s) | 0.41 (0.34) | −2.55 (<0.01) | 0.39 (0.66) |
| Distal latency (ms) | −0.05 (0.26) | 0.21 (<0.01) | 0.01 (0.84) |
| Median motor | |||
| Amplitude (mv) | −0.71 (0.63) | 0.61 (<0.01) | 0.87 (0.08) |
| Forearm CV (m/s) | −0.61 (0.65) | −1.88 (<0.01) | 0.72 (0.28) |
| Distal latency (ms) | 0.09 (0.31) | 0.39 (<0.01) | −0.01 (0.88) |
| F wave latency (ms) | 0.34 (0.26) | 0.6 (<0.01) | −0.09 (0.68) |
| Peroneal motor | |||
| Amplitude (mv) | −0.16 (0.82) | −1.15 (<0.01) | 0.08 (0.82) |
| Distal latency (ms) | 0.1 (0.11) | 0.09 (<0.01) | 0.16 (0.08) |
| F wave latency (ms) | 0.31 (0.99) | 1.39 (<0.01) | −0.62 (0.19) |
| Summary Z scores | |||
| Motor amplitude | −0.27 (0.64) | −0.14 (0.98) | 0.28 (0.18) |
| Motor conduction | −0.57 (0.37) | −0.08 (0.85) | 0.21 (0.52) |
| Sensory amplitude | −0.35 (0.41) | −0.01 (0.44) | 0.2 (0.37) |
| Sensory conduction | −0.02 (0.72) | 0.15 (0.93) | −0.24 (0.68) |